ZEN056V230A16LS Datasheet, PDF (1/9 Pages) Littelfuse – Polymer Enhanced Zener Diode Micro-Assemblies

PolyZen
Polymer Enhanced Zener Diode
Micro-Assemblies
PRODUCT: ZEN056V230A16LS
DOCUMENT: SCD27327
REV LETTER: F
REV DATE: JULY 26, 2016
PAGE NO.: 1 OF 9
Specification Status: Released
GENERAL DESCRIPTION
Littelfuse PolyZen devices are polymer
enhanced, precision Zener diode micro-
assemblies. They offer resettable
protection against multi-Watt fault events
without the need for multi-Watt heat sinks.
The Zener diode used for voltage clamping
in a PolyZen micro-assembly was selected
due to its relatively flat voltage vs current
response. This helps improve output voltage clamping, even
when input voltage is high and diode currents are large.
An advanced feature of the PolyZen micro-assembly is that the
Zener diode is thermally coupled to a resistively non-linear,
polymer PTC (positive temperature coefficient) layer. This PTC
layer is fully integrated into the device, and is electrically in
series between VIN and the diode clamped VOUT.
BENEFITS
 Stable Zener diode helps shield
downstream electronics from overvoltage
and reverse bias
 Trip events shut out overvoltage and
reverse bias sources
 Analog nature of trip events minimizes
upstream inductive spikes
 Minimal power dissipation requirements
 Single component placement
FEATURES
 Overvoltage transient suppression
 Stable VZ vs fault current
 Time delayed, overvoltage trip
This advanced PTC layer responds to either extended diode
heating or overcurrent events by transitioning from a low to
high resistance state, also known as” tripping”. A tripped PTC
will limit current and generate voltage drop. It helps to protect
both the Zener diode and the follow on electronics and
effectively increases the diode’s power handling capability.
 Time delayed, reverse bias trip
 Multi-Watt power handling capability
 Integrated device construction
 RoHS Compliant
TARGET APPLICATIONS
The polymer enhanced Zener diode helps protect sensitive
portable electronics from damage caused by inductive voltage
spikes, voltage transients, incorrect power supplies and
reverse bias. These devices are particularly suitable for
portable electronics and other low-power DC devices.
 DC power port protection in portable
electronics
 DC power port protection for systems
using barrel jacks for power input
 Internal overvoltage & transient
suppression
TYPICAL APPLICATION BLOCK DIAGRAM
 DC output voltage regulation
Power Supply
(External or Internal)
PolyZen Protected Electronics
GND
2
V_{IN 1 PolyZen}
+
Device
V_OUT
3 Regulated
Output
R_Load
Protected downstream
electronics
© 2016 Littelfuse,Inc.
Specifications are subject to change without notice.
Revised July 26,2016
littelfuse.com